How to reduce the noise of precision punch

2022-03-04

There are more and more factories using precision punching machines, and precision punching machines will generate a lot of noise. Now how to reduce the noise generated by precision punching machines has become an important thing. Now let's learn how to reduce the noise of precision presses.
1. The selection of sound-absorbing materials for precision punching can effectively reduce sound. The sound insulation board consists of 5 parts. The noise enters the sound-absorbing cotton through the small holes of the perforated plate, and part of the energy is converted into heat energy through the vibration of the glass wool, and the other part is consumed by the external Layers of steel plates are isolated to achieve the purpose of suction and isolation. The middle part of the sound-absorbing panel is made of sound-absorbing material, which is made of glass wool, which is used to absorb sound energy and is the main component of the noise reduction material.
2. Determination of the reverberation time of the precision punching machine workshop and the noise value of each noise source. The reverberation time refers to the indoor sound reaching a stable state. After the sound source of the precision punching machine stops sounding, the residual sound is reciprocatingly reflected in the room and absorbed by the wall surface. The average sound energy density The time to drop to one millionth of the original value. The longer the reverberation time is, it means that the sound is reflected many times in the workshop, and the energy decay rate is slow. Under the same sound source conditions, the workshop with a long reverberation time is more noisy than a workshop with a short reverberation time.
3. Sealing treatment of sound-absorbing panels, since the sealing treatment of the entire production line is to splicing multiple small sound-absorbing panels into a closed body, in order to ensure the noise reduction effect of the precision punching machine, it is necessary to control the sealing between each sound-absorbing panel during design and manufacture. The gap is generally 1 to 2 mm. In order to prevent noise from being transmitted through these gaps as much as possible to affect the effect of noise reduction, sealants are usually used to seal the gaps.
4. Ventilation treatment in the production workshop of precision punching machines. Due to the heat generated by the operation of the equipment itself and the thermal insulation properties of the sound-absorbing material glass wool, the temperature inside the production line is often 3-5°C higher than the outside after being closed. In the implementation of noise reduction projects, an exhaust fan is usually installed on the top of the soundproof wall to draw away the hot air in the closed space, so that a negative pressure is formed inside, and the outside air can flow into the interior through the soundproof wall. When choosing an exhaust fan, choose a low-noise fan so as not to affect the effect of noise reduction.
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